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Line Reactors

  

 

ATL Transformers Line Reactors conform to EN 61558, EN 5008-1 and -2, EN 50082-1 and -2

Frequency range:
Test voltage:
Good EMC conditions
High thermal stability
Insulation class
Max. ambient temperature:
Fire class:
Prepared for protection index I
Safety class:
Voltage range:
Double dip varnish and bake

50 Hz - 1 kHz
Winding - core 2,5 kV


B or F
40°C
UL94V0

IP00
0 - 400 V, other values on request
 

The given energy is only a guideline value

Current

Inductance

can be chosen, the inductance is determined by type size and energy
can be chosen, the current is determined by type size and energy

Tolerance of energy +/- 20% Tolerances as low as +/- 2.5% achievable on request.
Terminals can be either shock proof block term;s conforming to VBG4 / terminal studs (brass nickel plated) lugs or flying leads
 

 

Uk - calculation of a choke's voltage drop

The voltage drop of a smoothing coil and thus the voltage reduction of the connected load at the output can be determined as follows. The inductive or reactive reactance (XL) of the smoothing choke can be calculated with the inductance of the choke (L) and the mains frequency (fmains).

XL = ω . L = 2 π  fmains . L

 

The voltage drop (Uk) of the smoothing choke can be calculated with the rated current (IN) and the inductive reactance of the choke (XL):

for one-phase smoothing coils: Uk = IN . XL
for three-phase smoothing coils: Uk = IN . XL . √ 3

 

Example:

Calculation of the voltage drop (Uk) of an one-phase smoothing coil (Uk) with an inductance of
L = 0,3 mH, a current of I = 100 A and a rated voltage of 230 V at f = 50 Hz.

Reactance: XL = ω . L = 2 . 50Hz . 0,3mH = 0,094Ω
Voltage drop: Uk = IN . XL . = 100A . 0,094Ω  = 9,4V
Or given as percentage to mains voltage: UK% = Uk /  Umains  = 9,4/ 230 = 4%

 

At an american net with U = 110 V at f = 60 Hz, the choke acts as following:

Reactance: XL = ω . L = 2 . 60Hz . 0,3mH = 0,113Ω
Voltage drop: Uk = IN . XL . = 100A . 0,113Ω = 11,3V
Or given as percentage to mains voltage: UK% = Uk /  Umains = 11,3/ 110 = 10,2%

 

This means the same choke will have more than twice the Uk, if operated in an american net.

 

ATL chokes are calculated to have a small Uk%. Especially cut cores and cores made of amorphous and nanocrystalline materials have a small Uk% and thus low losses and a very good attenuation of harmonics.